616533662664 has 192 divisors, whose sum is σ = 1738435608000. Its totient is φ = 197274908160.

The previous prime is 616533662653. The next prime is 616533662707. The reversal of 616533662664 is 466266335616.

It is a happy number.

616533662664 is a `hidden beast` number, since 6 + 1 + 6 + 5 + 3 + 3 + 6 + 626 + 6 + 4 = 666.

It is a super-2 number, since 2×616533662664² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 616533662664.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36010234 + ... + 36027350.

It is an arithmetic number, because the mean of its divisors is an integer number (9054352125).

Almost surely, 2^616533662664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 616533662664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869217804000).

616533662664 is an abundant number, since it is smaller than the sum of its proper divisors (1121901945336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616533662664 is a wasteful number, since it uses less digits than its factorization.

616533662664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17388 (or 17381 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 54.

The spelling of 616533662664 in words is "six hundred sixteen billion, five hundred thirty-three million, six hundred sixty-two thousand, six hundred sixty-four".